#!/bin/sh

# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2009-2014 Stephan Raue (stephan@openelec.tv)

. /etc/swap.conf
. /etc/profile

if [ -f /storage/.config/swap.conf ]; then
  . /storage/.config/swap.conf
fi

if [ -f "$SWAPFILE" ]; then
  if [ $(ls -l "$SWAPFILE" | awk '{print  $5}') -lt $(($SWAPFILESIZE*1024*1024)) ]; then
    swapoff "$SWAPFILE"
    rm -rf "$SWAPFILE"
  fi
fi

if [ -e /dev/.storage_netboot ] ; then
  logger -t Boot "### netbooting... swap disabled ###"
  exit 0
fi

if [ ! "$SWAP_ENABLED" = yes ] ; then
  logger -t Boot "### swap disabled via configfile ###"
  exit 0
fi

SWAP=`blkid -t TYPE="swap" -o device`

case $1 in
  create)
    if [ -z "$SWAP" -a ! -f "$SWAPFILE" ]; then
      mkdir -p `dirname $SWAPFILE`
      dd if=/dev/zero of=$SWAPFILE bs=1M count=$SWAPFILESIZE
      chmod 0600 $SWAPFILE
      mkswap $SWAPFILE
    fi
    ;;
  mount)
    [ -z "$SWAP" -a -f "$SWAPFILE" ] && SWAP=$SWAPFILE
    for i in $SWAP; do
      swapon -p 10000 $i
    done
    ;;
  unmount)
    swapoff -a
    ;;
esac
